Actually you can by the whole MB service CD-Rom package by calling 1-800 for mercedes. I know because I have it. It's only $2550 plus tax A YEAR.
There is another set of CDs called INFO ACCESS (eight in the package for less than $300). They include streaming videos with sound. They are similar to a new model year book in that they cover in great detail new systems. They are gorgeous and most people here would love them. I gave my ch220 one to a Doctor that just bought one and he hasn't given it back.
I didn't buy them from MB but they must be available from them. Real neat stuff.
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician